Brake mechanism



Dec. 15, 1931.

H. PERROT BRAKE MECHANI SM Filed Feb. 4, 1926 2 Sheets-Sheet l .lill

' INVENTOR HEIJYRl PERROT ATTORNEY H. PERROT BRAKE MECHANI SM Dec. l5, 1931.

Filed Feb. 4. 1926 2 Sheets-Sheei 2 INVENTOR .HgYNRI PERRor .ATTORNEY applying device,

Patented Dec. 15,1931

UNITED STATES .PATENT OFFICE PERROT, OF PARIS, FRANCE, .ASSIGNOR BY IESNE ASSIGNMENTS, T BENDIX NEW YORK, N. Y., A. CORPORATION OF DELAWARE AVIATION CORPORATION', OF

' 1 BRAKE HIECHANISI Application led February! 4," 1926. Serial-No. 85,974.

This invention relates to brakes, and to operating mechanism used in applying brakes, and is illustrated as embodied in front wheel automobile brakes and operating mechanism therefor. .Y

One important feature relates to the use of a novel universal joint, suitable for use in the swivelling axis o f the wheel for o rating a brake on the wheel. In one deslrable manner even though the projections 'curved' more than 180.

Other features of novelty, includin a novel arrangement for clamping in place t e bearing for the shaft operated by the universal jolnt, an improved brake drum construction, an eicient but inexpensive one-piece brakeand other novel combinations of parts and desirable `particular constructions, will vbe apparent from the following description of two illustrative embodiments shown in the accompanying drawings, in which: i

Fig. 1 is a vertical section through the up# per-part of a brake and its associated arts; Fig. 2 is a verticalv section throng `the upper part of a different brake; ig. 3 is a top plan view of the entire brake control of Fig. 2; Fig. 4 is a side trol of Fig. 3; v

Fig. 5 1s"a top plan view of the control with the operating shaft det-ached; and

elevation of the brake con- 14 swivelled by a king pin l16 at one end which is prefof a front axle 18.- The drum, erably cast as part of the wheel, has a hardcned steel liner20, c ylindrical inform, fitted inside of and secure to the ing flange of the drum,

stampin Fig. 6 is a side elevation of part of the conspectively received lindrical brak- 7 an having at its` inner edge a circular flan projecting beyond the en edge of the rakiange. A backing plate 24 is provided with an outwardly-projecting flange 26 at its edge closely encircling the circular flan and forming a tight housing for 'the brake.

e 22 engaging and The brake itself may be of any desired conv struction, as for example that described and claimed in my copending application No. 742,156, led trated as applied by a thrust member 28 operated by arms 30 on a short shaft 32 journalled in a novel bearing 34 provided, if desired, with' a lubricant tting 36.

Bearing 34 has at -its end an enlargement 38 formed with a socket for a universal joint through which shaft 32 is rocked to a ply the brake by an operating shaft 40. Tlie open end of the socket is closed by a semi-spherical cap 42 carried by shaft 40. Bearing 34 has an abutment 44 engaging a flange 46 extending from knuckle 14, and against which rests the backing plate 24. The bearing passes through alined openings on its inner end serves the double purpose of clamping the bearing in lace and of clamping backing plate 24 to ange 46.

In the arrangement of Fig. 2, the drum is pressed from sheet metal,'and the bearing 52 is bolted or otherwise secured to the backl ing plate 54. In this case there is a unitary device, preferably in one brake-app1yin piece, and linc uding cylindricall bearing or shaft portions 56 and 58, between which is a cam 60 projecting through a slot in the inner October 17, 1924. It is illusin the'flange 46 and the backing plate 24, and a nut 48 threaded' end ofthe bearing. In this case Va pair of the bearln Shaft 40, and shaft 32 or shaft device' 56-60 as the case may be,

have pairs of projections or diverging arms 64 and 66, ar-

ranged at right angles to each other, and re^ in circumferentiallyextending grooves 68 and. 70 in a novel spherical connecting member`72. The inner edges of projections 64 and 66 are curved on cylindrical' arcs, and the bottoms of grooves 68 and cylindrical, except 0 are correspondingtliyttened at th te e m rthat the bottoms are gs 62 serve as a cap for the end of 'i sections 74 of the grooves along chordal planes common to the two cylindrical arcs. Projections 64 and 66 extend further than 180, so that the distance between their free extremities is greater by a slight clearance only than the perpendicular distance between the iiattened intersections 74.

The above-described flattening of the intersections permits shaft to be removed as in Fig. 5, by turning it 90, to bring the flattened intersections 7 4 in line with the free extremities of projections 64. Similarly shaft 32 or shaft device 56-60, as the case may be, may be separated from member 72 as in Fig. 6 by turning the latter 90 to bring the. flattened intersections 74 in line with the free extremities of projections 66. The parts are assemi:

bled by reversing these steps.

Where shaft portions 56 and 58 and cam 60 bearing 52 may have an are made in one piece, slot 80 from its inner end for cam 60, and,if desired, this slot may be deepened a little at one side to permit the one-piece device to be moved axially to the right so that projections 66 extend beyond bearing 52, to facilitate their two intersections along the common chordal plane of the two cylindrical bottoms to permit assembly and dismounting as de- '-scribed.

In testimony .'whereof, I have hereunto signed my name; HENRI PERROT.

assembling theuniversal joint. When'as-y 40 the terms of the appended claims.

I claim:

1. A brake drum including a cylindrical braking flange and havin a cylindrical liner secured to the inner face o the braking {ia-nge, the liner having an outwardly-extending circular flange at its inner edge engaging the end edge of and projecting beyond the braking ange.

2. Operating mechanism for a brake comprising, in combination, a bearing having an enlargement at one end formed with a socket, a brake-applying shaft journalled in the bearing and having a pair of diverging curved arms in the socket, an operating shaft extending into the open side of the socket and having a pair of diverging arms in the socket at right angles to the first pair of arms, the

inner edges of each pair of arms being on cylindrical arcs extending more than 180,

and a connecting spherical member in the socket having two circumferential grooves at right angles to each other and formed with j cylindrical bottom surfaces, one pair of said arms being received in each groove, and the bottoms o? the two grooves being attened at 

